Grady County

Every recorded tornado

1. Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Grady County: 15.
2. Weak tornadoes were under-recorded before Doppler radar coverage became national in the early 1990s, so earlier decades read low. Ratings use the Fujita scale before February 2007 and the Enhanced Fujita scale after.

Storm Prediction Center severe weather database, 1950 to 2025.

Every storm within 100 miles

1. Tropical storms and hurricanes (34 kt or more, still tropical) at closest approach. Post-tropical remnants with gale-force winds are listed but not counted. Direct: track within 50 miles; near: within 100 miles. Distance is measured to the county boundary for counties and to the city centre for cities, using positions interpolated hourly between HURDAT2 fixes.

National Hurricane Center HURDAT2, 1851 to 2025.

Every large fire

1. Large fires mapped by the Monitoring Trends in Burn Severity program since 1984: 1,000 acres or more in the West, 500 or more in the East. Prescribed burns are excluded. Acres here are the part of each perimeter inside this place.

Monitoring Trends in Burn Severity (USGS and U.S. Forest Service), 1984 to 2026.

Smoke overhead

1. A smoke day is a date on which a smoke plume traced by NOAA Hazard Mapping System analysts from satellite imagery covered this place's point (the county's population centre or the city centre). Counts here are of medium or heavy smoke. Since 2018 analysts have often drawn light smoke as one area over most of the continent, so light-smoke counts are not comparable from year to year. The plumes show smoke anywhere in the air above, not air quality at the ground, and smoke hidden by cloud is missed.

NOAA Hazard Mapping System smoke analysis, 2011 to 2026, retrieved October 30, 2026.

Claims by ZIP code

This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).

OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026. NOAA Storm Events through 2026.

River crests

River gauges

1. Crests are the highest and the recent crests the National Weather Service lists for each river gauge in the county that has a flood stage, not every flood. Flood categories use each gauge's current flood stages; crests from before levees, dams or channel changes may not be comparable. Crests measured on an old datum are left out of the rankings.

NOAA National Water Prediction Service gauge records, retrieved October 30, 2026.

1. The Palmer Drought Severity Index is computed by NOAA each month from the county's average temperature and precipitation, relative to the county's own climate. Zero is normal; -3 or lower is severe drought and -4 or lower extreme drought. It describes the long-term balance of moisture, not water supply or crop losses.

NOAA NCEI nClimDiv county Palmer Drought Severity Index, 1895 to September 2026, issued October 6, 2026.

Every earthquake of magnitude 4 or more within 50 miles

1. Earthquakes of magnitude 2.5 or more in the USGS Comprehensive Catalog since 1900. Within 50 miles means the epicentre lies within 50 miles of the county boundary (or inside the county).
2. Small earthquakes were under-recorded before the modern seismic networks of the 1970s and are still missed in remote areas, so early decades read low. Magnitudes are as the catalogue reports them and mix scales (moment, local and body-wave).

USGS ANSS Comprehensive Earthquake Catalog, 1900 to present, retrieved October 30, 2026.

More event types since 1996

Costliest events since 1996

1. May 3, 1999Tornado$90.0 million
   National Weather Service narrative

   Tornado A9 (Grady County portion). See summary at end of May 3rd storm reports. The beginning time of this tornado was changed from 1723 CST to 1726 CST. Please refer to the original version of May Storm Data for more information.

2. Dec 26, 2000Ice Storm, Grady$13.5 million
   National Weather Service narrative

   A major winter storm developed during the evening of the 25th across all of western, central, and southeast Oklahoma, with significant accumulations of snow and ice beginning shortly after 0000 CST on the 26th. Mainly snow fell across northwest Oklahoma with accumulations between 8 and 12 inches reported across northern Beckham, Roger Mills, and southern Ellis Counties. Snow amounts varied widely across the rest of northwest Oklahoma with 4 to 8 inches falling across portions of Dewey and Custer Counties, and only 1 to 2 inches across Woods and Alfalfa Counties, however even in areas where snow amounts were light, significant disruptions in travel and power outages were reported.A…

3. Dec 27, 2015Ice Storm, Grady$5.8 million
   National Weather Service narrative

   Damage estimates reported by local power companies.

4. Oct 22, 2000Flash Flood$1.5 million
   National Weather Service narrative

   Major flash flooding developed across a large portion of Grady County after several hours of heavy rain. In Chickasha, streets began closing at 2255 CST on the 22nd due to the rain, however it was not until approximately 0600 CST on the 23rd that the worst flooding developed. That was when Line Creek overflowed its banks allowing water to pour into downtown to a depth of 5 feet in spots. Approximately 30 people were rescued from the roof of cars and homes, and between 200 and 400 people were evacuated from their home. All of Chickasha, except the southwest corner of downtown, was flooded, with the worst flooding concentrated along US Routes 62 and 81 leading into Chickasha.…

5. Nov 27, 2015Ice Storm, Grady$1.1 million
   National Weather Service narrative

   Observed 0.5 inches of ice accumulation. Damage estimates are from local power cooperatives.

6. Aug 19, 2007Flash Flood$1.0 million
   National Weather Service narrative

   The Chickasha PD received major damage due to flooding, including the phone system, the communication system, data system, and the heating and air conditioning systems. Several businesses sustained damage. The River Bend Golf course received significant damage, including several greens destroyed and part of a golf cart path ripped up. It was reported that new flooring would be required at the Chickasha YMCA due to flooding in almost every room, as well as significant damage to the roof. The Grady County Courthouse received some minor flood damage. Performance Plus also received significant damage. HWY 37 was closed due to several feet of water covering the roadway one mile west of…

7. May 3, 1999Tornado$500,000
   National Weather Service narrative

   Tornado A8. See summary at end of May 3rd storm reports.

8. Apr 2, 2010Thunderstorm Wind$400,000
   National Weather Service narrative

   Widespread damage occurred in and around the Rush Springs area during the pre-dawn hours. Two areas of rotation occurred along the gust front, one moving through northern Rush Springs, and another moving across the south. The heaviest damage, with wind gusts estimated at 90-100 mph, occurred over the south side of town. In total, four unanchored mobile homes were destroyed. The former diner (Blue's Diner) located on Highway 81b was mostly destroyed, and the walk-in freezer was thrown approximately 40 yards. Several other structures were heavily damaged or destroyed and several large trees were uprooted. Seven distribution poles and nine transmission poles were downed. Numerous…

9. Jun 16, 2005Thunderstorm Wind$350,000
   National Weather Service narrative

   Extensive damage occurred in the River Bend Housing addition. A damage area one to two miles long (north to south) and two to three miles wide (east to west) was reported. Seventeen homes in the addition were damaged. One home that was partially built was completely destroyed. Another 5 homes sustained major damage, with half of the roof of one home completely ripped off. Eleven homes sustained minor damage mainly consisting of shingle damage, damage to garage doors, and windows broken. The Friends School Cafeteria nearby also sustained major roof damage. Widespread tree damage was also reported in the area.

10. Dec 7, 2023Wildfire, Grady$200,000
    National Weather Service narrative

    Heavy smoke from a nearby small grassfire lead to a multiple vehicle accident on Interstate 44 near Chickasha. This event resulted in three (indirect) fatalities and at least two additional injuries.

1. Storm Events records before 1996 cover only tornadoes, thunderstorm wind and hail. Damage figures are as reported by the National Weather Service at the time, not adjusted for inflation.

NOAA NCEI Storm Events Database, 1950 to 2026, issued October 26, 2026.

All-time high

113°FAug 3, 2012

All-time low

−14°FFeb 16, 2021

Warmest night

84°FAug 3, 2012

Coldest day

3°FDec 24, 1983

Wettest day

7.62 inJun 14, 2010

Snowiest day

13.5 inDec 24, 2009

Hottest year

2012mean 64.2°F

Coldest year

1968mean 58.2°F

Wettest year

200756.95 in

Driest year

195417.84 in

Snowiest season

24.4 in1967-68

Station Oklahoma City Will Rogers World (USW00013967), 1,279 ft elevation, 23.7 miles from the population centre. Daily records from 1948 to October 26, 2026; 100.0% of days in the last 30 years are complete. Records at a single station can differ from a city’s official threaded record, which may combine several stations.

NOAA NCEI Global Historical Climatology Network Daily.

This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).

OpenFEMA Disaster Declarations Summaries, retrieved October 30, 2026. Statewide declarations are not listed.

Neighbouring counties

• Tornadoes NOAA Storm Prediction Center severe weather database, through 2025.
• Tropical cyclones NOAA National Hurricane Center HURDAT2 (Atlantic; Northeast and Central Pacific), through 2025.
• Wildfire USGS/USFS Monitoring Trends in Burn Severity, through 2026.
• Storm events NOAA NCEI Storm Events Database, through 2026.
• Flood insurance OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026.
• Declarations OpenFEMA Disaster Declarations Summaries v2, retrieved October 30, 2026.
• Weather records NOAA NCEI Global Historical Climatology Network Daily, station USW00013967.
• River crests NOAA National Weather Service, National Water Prediction Service river gauges, retrieved October 30, 2026.
• Drought NOAA NCEI nClimDiv county Palmer Drought Severity Index, through September 2026.
• Smoke NOAA NESDIS Hazard Mapping System smoke analysis, retrieved October 30, 2026.
• Earthquakes USGS ANSS Comprehensive Earthquake Catalog (ComCat), retrieved October 30, 2026.

Joins, thresholds and known limits are set out in the methodology. Found an error? Report it. Page built October 30, 2026.